Cam-pump.



A. D. (300K.

0AM PUMP.

APPLIOATION FILED FEB. 4, 1914. 1,1 17, 166. Patented Nov. 17,1914.

2 8HEBTS-SHEET 1.

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THE NUKKIS PETERS CQ, PHOTO-LITHIL. WASHINGTGN'; D. C.

A. D. COOK. CAM PUMP.

APPLICATION IILBD FEB. 4, 1914.

1.1 17,166. Patented Nov. 17, 1914.

2 SHEETS-SHEET 2.

AUGUST D. COOK, OF LAWRENCEBURG, INDIANA.

CAM-PUMP.

Specification of Letters Patent.

Patented Nov. 17, 1914.

Application filed February 4, 1914. Serial No. 816,456.

To all whom it may concern Beit known that I, AUGUST 1). (3001:, a citizen of the United States, and a resident of the city of Lawrenceburg, the county of Dearborn. and State of Indiana, have in vented certain new and useful Improvements in Cam-Pumps, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

' The cam pump is employed especially Where smooth and continuous flow of liquid is desired in pumps having double plungers. In such pumps, the rod for one plunger passesthrough a sleeve which serves as the connection for the other plunger, and through this other plunger. The two plungers are then drawn up and forced down in opposition to each other, in such a way that each plunger begins its up-stroke before the other one has completed its up-stroke. Cam raising and lowering frames which are connected to the pump rods are the best means for obtaining the variable motion necessary to accomplish this result.

It is the object of this invention to supply for this special branch of the pump art, an arrangement of cams, cam frames and pump rods, which will permit of the greatest efliciency in operation, together with an easy and simple mounting of the various devices employed. This is accomplished by that certain construction and arrangement of parts to be hereinafter pointed out and claimed, whereby a central cam is used to raise one pump plunger, and a pair of cams to raise the other plunger by means of a cross head on the sleeve connected to said plunger. As will be developed, this permits a straight thrust in each instance and a simple mounting of the cam frames.

,In the drawings, Figure 1 is a front elevation of the pump. Fig. 2 is a side elevation thereof, with a side standard removed. Fig. 3 is a horizontal section on the line 3, 3, of Fig. 1. Fig. lis a perspective view of the rear of the framework.

The framework of the pump comprises the side standards 1, 1, suitably mounted on a base 2. These standards or uprights are provided with journals 3, 3, for the cam shaft 4. The cam shaft is driven by the gear wheel 5, the power connections wherewith it has not been deemed necessary to illustrate. The framework of the pump structure, which is preferably cast all in one piece, has a top portion 6 and a central cross piece 7 and'is open between the side standards 1, 1. In this open part are placed the two guides 8 and 9, extending vertically from the top portion to a point beyond the cross piece. These guides are also preferably integral with the framework, and are hollow at the rear (Fig. 4:) and have their front faces 10 and 11 polished to serve as guides for the cam frames. The side standards 1, 1 are cut away to form shoulders 12 and 13, .to present a vertical polished surface in the same plane as the faces 10 and 11 of the guides 8 and 9 (Fig.

Bolted on the front of the frameworkv with their polished inner faces in opposition to the faces 10 and 11, are the narrow longitudinal plates 14 and 15, and on the front of the side standards the plates 16, 16, and 17 17 are bolted to present a polished face opposite to the shoulders 12 and 13 of the standards. This construction it can now be seen provides open spaces for the placing of three cams and guideways for three cam frames. The simplicity of structure is obvious and the advantages in manufacture over the complicated devices of the past are plain.

On the cam shaft 4: are mounted in the spaces of the frame, as intimated, the cams 18, 19 and 20. Each of'these cams has a peripheral face A for the upward stroke and a face B for the downward stroke. Since the cams are of heart-shape as is old in the art, and the faces are shaped to give a speedier downward than upward stroke, all of which is old, no detailed description of the cams is necessary. The cams 18 and 20 are mounted so as to be in exactly the same position on the shaft 4:, and the central cam 19 is mounted so as to work in the opposite direction to the two outside cams. Over these'cams, placed so that the cams revolve inside of them, arethe cam framesor yokes 21,22 and 23.v These cam frames are bent forwardly at their central portion (Fig. 2) to permit passage for the shaft 4:, and to permit a sliding up and down of the frames. The frames have also, at each side of each end, pairs of'laterallyextending flanges or wings 24. These flanges slide one on one side and one on the other of the guideways formed as hitherto described. fhe flanges of the two outside yokes, which extend toward the middle of the pump, and the flanges of the central yoke utilize the same guideways 10, if and 11, 15, constructed as above noted. It will be understood that the frames are mounted before the plates I l, 15, 16 and 1'? are bolted to the framework.

suitable means of lubrication is provided which, as it comprises no part of the present invention, it has not been thought necessary to illustrate or describe herein.

To remove the cam frames at any time requires the removal of the plates la, 15, 16 and 17, an obviously simple operation.

Mounted on spindles .25 at each end of each cam faune are the upper and lower antifriction rollers 26 and 27, the upper one so as to contact with the face A of its cam, and the lower one with its face B.

The pump plungers or pistons (not shown) are connected one of them to the sleeve 28, and one to the rod 29, which latter parts are actuated by the cam frames. A cross head 30 is placed on the sleeve 28, and the ends of the cross head connected by the rods 31 and 32 with the two outer cam frames. The central rod 29 is connected to the central cam frame. A direct thrust of each frame is thereby accomplished with no lost energy by the use of cross arms, as is the common usage. ff but two cam frames were provided, there would be necessary in order to accomplish the raising of a centrally located rod and sleeve, an l.-shaped connection from one or both of the frames, and this is here avoided.

The use of a cross head similar to that of this pump is not new in the crank pump art. But a crank pump has not the features of the cam pump. There is not the difficulty in mounting the cam frames; a pivotal connection to the cross head is requisite, and no straight, direct thrust can possibly be had. The cross head operated by two reciprocating frames or yokes, has thus a function which could not be approached by a crank. Furthermore this new arrangement is a very advantageous departure from the usage in cam pumps of the past.

it is not intended by the details of description above, to limit the scope of the claims that follow by making requisite such features as are merely mechanical expedients due to the special design adopted for purposes of illustration.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent, is 2-- 1. In a double plunger pump, a shaft, three rotatable cams on said shaft, a central cam frame connected to one of the plungers and actuated by the central cam, and two outside cam frames connected to the other plunger and actuated by the two outer cams and means for forming guideways for the cam frames directly over and in line with the pump rods.

in a double plunger pump, three reciprocating cam frames, cam means for actuating the frames, a rod for one of the plungers, a sleeve for the other plunger, a cross head on the sleeve, connections from the central frame to the rod and connections from the two outer frames to the cross head and means for forming guideways for the cam frames directly over and in line with the pump rods.

3. In a double plunger pump having telescopic pump rods, a cross head on the outer pump rod, a shaft, a central and two outer cams on the shaft, cam frames with antifriction rollers for contact with the cams and means for mounting them so as to reciprocaoe vertically, said frames located the inner one directly over the inner pump rod and the two outer ones directly over the ends of the cross head.

in a double plunger pump, a plurality of cum frames, a framework for the pump with side standards and interspaced vertical guide arms, guide plates and means for mounting them opposite and spaced away from the vertical guide arms, and flanges on the cam frames to slide in said guideways.

5. In a double plunger pump, a plurality of cam frames, a framework for the pump with side standards having vertical guide faces, and interspaced vertical guide arms, guide plates and means for mounting them opposite and spaced away from the guide faces and guide arms, so as to form guideways for two sets of flanges at each guide arm, and flanges on the cam frames to slide in said guideways.

6. In a double plunger pump, three cam frames and means for mounting them to reciprocate vertically, comprising a framework having two side standards with vertical guides thereon, two interspaced vertical guide bars between the side standards and integral with the framework, guide plates mounted opposite to the guides aforementioned, to form four guideways, and flanges on the cam frames to slide in the guideways.

7. in a double plunger pump, three cam frames and means for mounting them to reciprocate vertically, comprising a framework having two side standards with vertical guides thereon, two interspaced vertical guide bars between the side standards and integral with the framework, detachable guide plates mounted opposite to the guides aforementioned, to form four guideways, and flanges on the cam frames to slide in the guideways.

8. In a double plunger pump, a plurality of cam frames and means for mounting them to reciprocate vertically, comprising a of flanges at each guide bar and flanges on I framework having side standards, vertica1 the cam frames to slide in the guideways. guides formed thereon, vertical gulde bars i interspaced between the side standards, de- AUUUSI COOK tachable guide plates mounted opposite and Witnesses: spaced away from the guides aforemen- 1 CORNELIUS UBRIEN, tioned to form four guideways for two sets CARL F. K0011.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Iatents,

Washington, 13.0. 

